-
这是一个非常困难的问题。
This is too difficult a problem.
youdao
-
一个特殊彗星轨道是一个非常困难的数学问题。
The orbit of one particular comets was a very difficult mathematical problem.
youdao
-
一个特殊彗星轨道是一个非常困难的数学问题。
The orbit of one particular comets was a very difficult mathematical problem.
youdao